Eixample was built in one creative burst of energy in the late 19th century, and contains several of the city’s most celebrated architecture such as the UNESCO World Heritage site Casa Milà, Casa Batlló, and Casa Amatller, where you can buy some of the city’s best chocolate. Walk down the famous Block of Discord, Barcelona’s architectural version of the theme park with all kinds of wildly inspired buildings. Don’t miss out on the incredible rich and varied Catalan cuisine in any of the outdoor cafes lining the streets.